Envelop.



fjl,

M. VIERENGEL. ENVELOP.

APPucATJoMy msn ngc. 22. lsu.

Patentd May 6, 1919.

i MATTHEW VIEBENGEL, OF BROOKLYN, NEW YORK.

ENvELoP.

Specification of Letters Patent. i Patented luay 6, 1919.

Application iled December -22, 1917. ,Seria1No.208,490.

To u!! whom/15 may concern.'

llc it known that I., MATTI-inw VlERENeEL, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented cert-ain new andV useful Improvements in Envelops, of which the following is a full and clear specih'cation.

My invention relates to postal inspection envelope of the type which simulates the ordinary coniiinercial envelop and are sealed in the manner of such envelops, but in' which a flap, other than the usual sealing iap, is unsealed and turned in, so that the com'- munication appears to be a sealed communication, but is. nevertheless, open to postal inspection.

In the usual envelops of this type both the end Hap and the ordinary sealing flap of the commercial envelop are lleft unsealed by the envelop making machines and the user of the envelop, after inserting the communication, seals the ordinary sealing Hap, leavingr the end iap in, folded position within the envelop in the way in which it hasl been folded and left unsealed bythe machine. This yend flap being, therefore, available to the postal inspector for inspecting the conients of the envelop.

The accompanying drawing shows the steps in the manufacture of my improved envelop,

Figure 1 being an elevation of the envelop lilank at that point in its .manufacture after the fiapshave been gummed and the figure showing the back Hap partly turned up to illustrate the `gumming of the end flap thereof. y v

Fig. 2 is a similar elevation showing the point at which the back and two gummed end flaps are folded and sealed, with the sealing flap not yet folded and sealed.

Fig. 3s a si-milar view of the completed envelop.

Fig. 4 is a similar view to a smaller scale and part broken away to illustrate a modified form.

The envelop blank is formed in the usual way and of any preferred shape and its flaps are of any usual or preferred shape. t may lie formed premlminarily in quantity and handled from a pile or be formed during the course of making' the envelops from a roll of paper. l'The drawing illustrates a fol'ln adapted 'to be made continuously in the machine from arroll of paper. In mak- .the gum is applied ing the envelop blank, it is provided with' the portion 1, which is to form the front of the envelop, the portion which is to form iaps 4 and 5 will be gummed on the faces i here illustrated or each on the opposite face from that here illustrateda depending upon whether these liaps are to be folded outside or inside of the back flap when the blank is folded. The flaps 3 and 4 are sealing flaps, but the flap 5 is merely a reinforcing fia to provide double thickness at the open en of the envelop. The reinforcing flap may be formed on the front and the inspection flap on lthe back instead of as here shown. The gum `having been applied as shown in Fig. 1, the back 2 is folded against the front 1, the iap 4 folded with its gumlned surface against the back 2 and the iap 5 also folded with its gummed surface against said back. The sealing flap 3 is then folded down against the back 2, its ends, in the construction here shown, butVnot necessarily in all cases, covering the ends of the flaps 4 and 5. The inspection flap 6 is left ungummed and not folded. The several gummed aps having all been folded down and sealed the resulting envelop has the appearance shown4 in Fig. 3, and it will be noticed that the sealed flaps are all sealedin the machine and the inspection Hap is left outside, so that when the contentsl are put in from theend of 4the envelop lthe inspection fla'pmay be also turned in over the contents to ep them in safety. .In Fig. 4 I have shown a modified form of blank in which both end {iaps are iput on the back, but in which as in the other cases, to opposite faces of the flaps 4 and.l In all cases, the gum, instead of beingapplied to tliellaps, may be ut` upon the correspondingl part of the enve op body.

The advantages of this method are as follows: Makin 4the envelops with the sealing l Hap 'gamme down allows the envelo ma; chine to be run much faster than or inary machines, in which the nishlng of the operation is necessarily' delayed for the drying? of the gum onvthe sealingap. The ma. chine is much simplified and cheapened by the omission of drying apparatus and other complicated parts attached to it. AIn actulally vusing the envelop it has been found, in

the contents in in the old Way, then moi'stenv theV sealing flap, turn it over and press it down. Furthermore, when the contents are put in in this Wa it is certainv that the inspection flap wil be putin in such manner .as to prevent anything from falling out, but with prior envelops of this type much care hasto'be used in manipulating the envelop in order to put the insertion in'correctly, so that it will be held in'by the inspection fiap, it being usually necessary to insert the finger into the envelop to hold the sealing flap away from the bod of the enf velop, so as to be able to get t e insertion between the inspection flap and the front of 4the envelop, this being the only condition which will prevent the contents from falling out when the envelop is in'transit.

I claim:

An envelop havin the body portion composed of front 1 an lthe back 2, 'an end flap 4 o n one of said members sealed to the other member, reinforcing end flap 5 on the other end of the envelop sealed to the member which carries it, a,v top flap 3 on the front 1 sealed to the back 2, and an unsealed inspection a 6l at the same end of the envelopv as the ap 5, but unattached to said fiap and carried by the member of the envelop body portion which does not carry the end flap 5.

MATTHEW VIERENGEL. 

